Some changes to make it easier to run the sample with the database driver as part of the jetty plugin configuration, preventing classloader leaks.

samples/contacts/pom.xml

@@ -66,16 +66,16 @@
             <groupId>net.sf.ehcache</groupId>
             <artifactId>ehcache</artifactId>
         </dependency>
-        <dependency>
-            <groupId>hsqldb</groupId>
-            <artifactId>hsqldb</artifactId>
-            <scope>runtime</scope>
-        </dependency>
         <dependency>
             <groupId>hessian</groupId>
             <artifactId>hessian</artifactId>
             <version>3.0.1</version>
         </dependency>
+        <dependency>
+            <groupId>hsqldb</groupId>
+            <artifactId>hsqldb</artifactId>
+            <scope>runtime</scope>
+        </dependency>
         <dependency>
             <groupId>log4j</groupId>
             <artifactId>log4j</artifactId>
@@ -96,11 +96,21 @@
                 <configuration>
                     <contextPath>/contacts</contextPath>
                     <!--jettyConfig>${basedir}/src/test/resources/jetty.xml</jettyConfig-->
-                    <scanIntervalSeconds>10</scanIntervalSeconds>
+                    <scanIntervalSeconds>5</scanIntervalSeconds>
                     <!--scanTargets>
                         <scanTarget>src/main/webapp/css</scanTarget>
                     </scanTargets-->
                 </configuration>
+<!--
+                <dependencies>
+                    <dependency>
+                        <groupId>hsqldb</groupId>
+                        <artifactId>hsqldb</artifactId>
+                        <version>1.8.0.7</version>
+                        <scope>runtime</scope>
+                    </dependency>
+                </dependencies>
+ -->
             </plugin>
         </plugins>
     </build>

samples/contacts/src/main/java/sample/contact/DataSourcePopulator.java

@@ -76,6 +76,18 @@ public class DataSourcePopulator implements InitializingBean {
                 AuthorityUtils.createAuthorityList("ROLE_IGNORED"));
         SecurityContextHolder.getContext().setAuthentication(authRequest);
 
+        try {
+            template.execute("DROP TABLE CONTACTS");
+            template.execute("DROP TABLE AUTHORITIES");
+            template.execute("DROP TABLE USERS");
+            template.execute("DROP TABLE ACL_ENTRY");
+            template.execute("DROP TABLE ACL_OBJECT_IDENTITY");
+            template.execute("DROP TABLE ACL_CLASS");
+            template.execute("DROP TABLE ACL_SID");
+        } catch(Exception e) {
+            System.out.println("Failed to drop tables: " + e.getMessage());
+        }
+
         template.execute(
             "CREATE TABLE ACL_SID(" +
                     "ID BIGINT GENERATED BY DEFAULT AS IDENTITY(START WITH 100) NOT NULL PRIMARY KEY," +